Place a saucepan on medium heat. Add butter and let it melt slowly without browning to keep the flavor smooth.

Add minced garlic to melted butter. Cook for one minute until fragrant but not browned to avoid bitter taste.

Slowly add heavy cream into the pan. Stir gently and let it warm up without boiling too fast.

Let the mixture cook on low heat for a few minutes. Stir often until it starts to thicken slightly.

Add grated Parmesan cheese slowly while stirring. Mix until cheese melts completely and sauce becomes creamy and smooth.

Add salt, black pepper and nutmeg if using. Stir well and adjust seasoning according to your taste.

If sauce is too thick, add a little milk. If too thin, cook a bit longer while stirring.

Remove from heat and garnish with fresh parsley. Serve immediately over pasta for best taste and texture.